Cooling medium for internal-combustion engines.



@ NIE JAMES N. McCOY, vmcnunns, INDIANA.

COOLING MEDIUM FOR INTERNAL-COMBUSTION ENGINES.

No Drawing.

, cation.

This invention relates to liquid composition for use in circulatory systems as means for cooling or preventing excessively high temperatures in vessels or high speed machinery, the invention having reference more particularly to means for cooling the cylinders of explosion engines, especially those of automobiles.

Heretofore it has been the practice tocool explosion engine cylinders by means of circulating water, and the water has been permitted to remain in the circulatory system when the engines have not been used in the winter seasons With the result that the water has frozen and caused considerable expense for repairs due to bursting of pipes or radiator coils, and it is the object of the present-invention to provide cooling medium for.

the cylinders that may be safely used throughout the winter seasons without risk of entailing-g disastrous results on account of freezing of the cooling liquid at any low atmospherictemperature to which the liquid is subjected in practical use, a further ob ject being to provide a safety engine cooler that will be adapted for northern as well as southern latitudes and obviate the necessity of drawing off the circulatory Water hitherto found necessary in order to prevent damage due to freezing of the liquid when the automobiles are temporarily Withdrawn from service or at night time in cold ,ga-

rages. j

A still further object is to provide a safety circulatory composition for cooling explosion engine cylinders that shall not be deleterious to the materials used in the construction of the circulatory system of automobile engines.

A specific object of the invention is to provide a cooling medium for explosion engines that shall have the properties of being low in degree of expansibility and contractibility, in order that the circulatory system of the engine shall not overflow at relatively high temperature nor become deficient in liquid at relatively lower temperatures in action, a liquid having less expan- Specification of Letters Patent.

sibility and contractibility than water being desirable for the purpose.

With the above mentionedand minor ob jects in view, the invention consists in a safety explosion engine cooler comprising a substantially non-freezable coolingliquid for the circulatory system of explosive en gines characterized by its ability to remain in a liquid state in a temperature of approximately 25 degrees below zero, Fah.

The invention consists more specifically in a new and useful composition of matter for cooling engine cylinders, and in the combinations of elements hereinafter particularly described and defined in the accompanying claim.

The engine cylinder water jackets, the radiator coil and the several conduits connected with them and a circulatory pump constitute the circulatory system of an explosion engine as will be understood, and in somecas'es the circulatory pump may be omitted from the system. The improved cooling composition fills the circulatory system and, as will be understood, circulates through the system, the composition becoming heated in the Water jackets and then cooled in the radiator and returns to the Water jacket to cool the cylinders and carry away the-heat therefrom, the process being continuous, as will be understood.

The liquid medium for the circulatory system is a composition which preferably consists, stated in non-technical terms, of water and sodium thiosulfate, and in some cases potassium permanganate; or,. the liquid may be composed of other equivalent Patented July 7,1914, I Application tiled January 26, 1912. Serial No. 673,534.

liquid substance capable of withstanding the lowest degree of temperature, in which the'use of automobiles is practicable or desirable, Without freezing in the circulatory system for cooling the explosion cylinders.

The composition of matter constituting the cooling liquid preferably employed consists of sodium thiosulfate in the proportion of sixty-four ounces dissolved in distilled Water of sufficient quantity to make one gal lon of the composition, and preferably onehalf ounce of potassium permanganate in-- cluded in the gallon quantity. In order to obtain a stable solution, the sodium thiosulfate is dissolved in four parts of cold distilled water. The mixture, including the potassium permanganate if desired, is boiled fifteen minutes and then filtered. Ar

sufficient quantity of the composition is poured. into the circulatory system of thesodium thiosulfate is proven in practice to have the qualifications requisite to resist the tendency to freeze under the conditions (rc-n'imonly imposed on automobile engines, in the most severe winter atmosphere in habitable latitudes, and is not more deleterious than wateralone to the metals with which it comes in contact, and the slight tendency of the composition to causeor to permit oxidation of the metals, is obviated when the potassium permanganate is included as one of the ingredients of the composition, the latter chemical acting as a preservative agent because of the aflinity between iron and manganese, in consequence of whlch a coatlng is deposited upon the walls of the engine cylinders and circulatory ducts which, thus protected, do not so readily yield to oxidation. Without the potassium permanganate being present in the composition, however, there is no tendency on the part of the sodium thiosulfate to corrode metals, but water being known to have such tendency it is desirable to counteract it in the improved composition.

The improvedcomposition gages a specific gravity of 1,027 by Baum hydrometer test,- is not changed in character by the heatit has less expansion under heat, or is slower in expanding and contracting than a like quantity,'by volume, of water. 1

In practica use, the improved engine cooler is caused to act in the manner re quired as a result of the design of the circulatory system, the liquid cooling medium circulating in the system and absorbing the heat from the cylinders and giving it on in the radiato-r'as is customary. \Vhen the engine is not in use the liquid remains in the circulatory system without endangering the system in freezing temperatures, so that the cooling composition is always in proper condition for use when required.

Having thus described the invention, what is claimed as new is A composition of matterforcooling explosion engine cylinders, said composition consisting of the liquid formed by the combination of water, sodiumthiosulfate and potassium permanganate, the composition being capable of withstanding inordinately low degrees'of cold without freezing.

In testimony whereof, I aflix my signature in presence of two witnesses.

JAMES N. CCOY.

Witnesses:

GEORGE H; MrLLER, OSCAR B. WILLIAMSON. 

